3 * Linux ethernet bridge
6 * Lennert Buytenhek <buytenh@gnu.org>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/rculist.h>
17 #include <linux/spinlock.h>
18 #include <linux/times.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/jhash.h>
22 #include <linux/random.h>
23 #include <linux/slab.h>
24 #include <linux/atomic.h>
25 #include <asm/unaligned.h>
26 #include <linux/if_vlan.h>
27 #include <net/switchdev.h>
28 #include "br_private.h"
30 static struct kmem_cache *br_fdb_cache __read_mostly;
31 static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head,
32 const unsigned char *addr,
34 static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
35 const unsigned char *addr, u16 vid);
36 static void fdb_notify(struct net_bridge *br,
37 const struct net_bridge_fdb_entry *, int);
39 static u32 fdb_salt __read_mostly;
41 int __init br_fdb_init(void)
43 br_fdb_cache = kmem_cache_create("bridge_fdb_cache",
44 sizeof(struct net_bridge_fdb_entry),
46 SLAB_HWCACHE_ALIGN, NULL);
50 get_random_bytes(&fdb_salt, sizeof(fdb_salt));
54 void br_fdb_fini(void)
56 kmem_cache_destroy(br_fdb_cache);
60 /* if topology_changing then use forward_delay (default 15 sec)
61 * otherwise keep longer (default 5 minutes)
63 static inline unsigned long hold_time(const struct net_bridge *br)
65 return br->topology_change ? br->forward_delay : br->ageing_time;
68 static inline int has_expired(const struct net_bridge *br,
69 const struct net_bridge_fdb_entry *fdb)
71 return !fdb->is_static &&
72 time_before_eq(fdb->updated + hold_time(br), jiffies);
75 static inline int br_mac_hash(const unsigned char *mac, __u16 vid)
77 /* use 1 byte of OUI and 3 bytes of NIC */
78 u32 key = get_unaligned((u32 *)(mac + 2));
79 return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1);
82 static void fdb_rcu_free(struct rcu_head *head)
84 struct net_bridge_fdb_entry *ent
85 = container_of(head, struct net_bridge_fdb_entry, rcu);
86 kmem_cache_free(br_fdb_cache, ent);
89 /* When a static FDB entry is added, the mac address from the entry is
90 * added to the bridge private HW address list and all required ports
91 * are then updated with the new information.
94 static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr)
97 struct net_bridge_port *p;
101 list_for_each_entry(p, &br->port_list, list) {
102 if (!br_promisc_port(p)) {
103 err = dev_uc_add(p->dev, addr);
111 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
112 if (!br_promisc_port(p))
113 dev_uc_del(p->dev, addr);
117 /* When a static FDB entry is deleted, the HW address from that entry is
118 * also removed from the bridge private HW address list and updates all
119 * the ports with needed information.
122 static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr)
124 struct net_bridge_port *p;
128 list_for_each_entry(p, &br->port_list, list) {
129 if (!br_promisc_port(p))
130 dev_uc_del(p->dev, addr);
134 static void fdb_del_external_learn(struct net_bridge_fdb_entry *f)
136 struct switchdev_obj_port_fdb fdb = {
137 .obj.id = SWITCHDEV_OBJ_ID_PORT_FDB,
138 .addr = f->addr.addr,
142 switchdev_port_obj_del(f->dst->dev, &fdb.obj);
145 static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f)
148 fdb_del_hw_addr(br, f->addr.addr);
150 if (f->added_by_external_learn)
151 fdb_del_external_learn(f);
153 hlist_del_rcu(&f->hlist);
154 fdb_notify(br, f, RTM_DELNEIGH);
155 call_rcu(&f->rcu, fdb_rcu_free);
158 /* Delete a local entry if no other port had the same address. */
159 static void fdb_delete_local(struct net_bridge *br,
160 const struct net_bridge_port *p,
161 struct net_bridge_fdb_entry *f)
163 const unsigned char *addr = f->addr.addr;
164 struct net_bridge_vlan_group *vg;
165 const struct net_bridge_vlan *v;
166 struct net_bridge_port *op;
167 u16 vid = f->vlan_id;
169 /* Maybe another port has same hw addr? */
170 list_for_each_entry(op, &br->port_list, list) {
171 vg = nbp_vlan_group(op);
172 if (op != p && ether_addr_equal(op->dev->dev_addr, addr) &&
173 (!vid || br_vlan_find(vg, vid))) {
175 f->added_by_user = 0;
180 vg = br_vlan_group(br);
181 v = br_vlan_find(vg, vid);
182 /* Maybe bridge device has same hw addr? */
183 if (p && ether_addr_equal(br->dev->dev_addr, addr) &&
184 (!vid || (v && br_vlan_should_use(v)))) {
186 f->added_by_user = 0;
193 void br_fdb_find_delete_local(struct net_bridge *br,
194 const struct net_bridge_port *p,
195 const unsigned char *addr, u16 vid)
197 struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
198 struct net_bridge_fdb_entry *f;
200 spin_lock_bh(&br->hash_lock);
201 f = fdb_find(head, addr, vid);
202 if (f && f->is_local && !f->added_by_user && f->dst == p)
203 fdb_delete_local(br, p, f);
204 spin_unlock_bh(&br->hash_lock);
207 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr)
209 struct net_bridge_vlan_group *vg;
210 struct net_bridge *br = p->br;
211 struct net_bridge_vlan *v;
214 spin_lock_bh(&br->hash_lock);
216 vg = nbp_vlan_group(p);
217 /* Search all chains since old address/hash is unknown */
218 for (i = 0; i < BR_HASH_SIZE; i++) {
219 struct hlist_node *h;
220 hlist_for_each(h, &br->hash[i]) {
221 struct net_bridge_fdb_entry *f;
223 f = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
224 if (f->dst == p && f->is_local && !f->added_by_user) {
226 fdb_delete_local(br, p, f);
228 /* if this port has no vlan information
229 * configured, we can safely be done at
232 if (!vg || !vg->num_vlans)
239 /* insert new address, may fail if invalid address or dup. */
240 fdb_insert(br, p, newaddr, 0);
242 if (!vg || !vg->num_vlans)
245 /* Now add entries for every VLAN configured on the port.
246 * This function runs under RTNL so the bitmap will not change
249 list_for_each_entry(v, &vg->vlan_list, vlist)
250 fdb_insert(br, p, newaddr, v->vid);
253 spin_unlock_bh(&br->hash_lock);
256 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr)
258 struct net_bridge_vlan_group *vg;
259 struct net_bridge_fdb_entry *f;
260 struct net_bridge_vlan *v;
262 spin_lock_bh(&br->hash_lock);
264 /* If old entry was unassociated with any port, then delete it. */
265 f = __br_fdb_get(br, br->dev->dev_addr, 0);
266 if (f && f->is_local && !f->dst)
267 fdb_delete_local(br, NULL, f);
269 fdb_insert(br, NULL, newaddr, 0);
270 vg = br_vlan_group(br);
271 if (!vg || !vg->num_vlans)
273 /* Now remove and add entries for every VLAN configured on the
274 * bridge. This function runs under RTNL so the bitmap will not
275 * change from under us.
277 list_for_each_entry(v, &vg->vlan_list, vlist) {
278 f = __br_fdb_get(br, br->dev->dev_addr, v->vid);
279 if (f && f->is_local && !f->dst)
280 fdb_delete_local(br, NULL, f);
281 fdb_insert(br, NULL, newaddr, v->vid);
284 spin_unlock_bh(&br->hash_lock);
287 void br_fdb_cleanup(unsigned long _data)
289 struct net_bridge *br = (struct net_bridge *)_data;
290 unsigned long delay = hold_time(br);
291 unsigned long next_timer = jiffies + br->ageing_time;
294 spin_lock(&br->hash_lock);
295 for (i = 0; i < BR_HASH_SIZE; i++) {
296 struct net_bridge_fdb_entry *f;
297 struct hlist_node *n;
299 hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) {
300 unsigned long this_timer;
303 if (f->added_by_external_learn)
305 this_timer = f->updated + delay;
306 if (time_before_eq(this_timer, jiffies))
308 else if (time_before(this_timer, next_timer))
309 next_timer = this_timer;
312 spin_unlock(&br->hash_lock);
314 mod_timer(&br->gc_timer, round_jiffies_up(next_timer));
317 /* Completely flush all dynamic entries in forwarding database.*/
318 void br_fdb_flush(struct net_bridge *br)
322 spin_lock_bh(&br->hash_lock);
323 for (i = 0; i < BR_HASH_SIZE; i++) {
324 struct net_bridge_fdb_entry *f;
325 struct hlist_node *n;
326 hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) {
331 spin_unlock_bh(&br->hash_lock);
334 /* Flush all entries referring to a specific port.
335 * if do_all is set also flush static entries
336 * if vid is set delete all entries that match the vlan_id
338 void br_fdb_delete_by_port(struct net_bridge *br,
339 const struct net_bridge_port *p,
345 spin_lock_bh(&br->hash_lock);
346 for (i = 0; i < BR_HASH_SIZE; i++) {
347 struct hlist_node *h, *g;
349 hlist_for_each_safe(h, g, &br->hash[i]) {
350 struct net_bridge_fdb_entry *f
351 = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
356 if (f->is_static || (vid && f->vlan_id != vid))
360 fdb_delete_local(br, p, f);
365 spin_unlock_bh(&br->hash_lock);
368 /* No locking or refcounting, assumes caller has rcu_read_lock */
369 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
370 const unsigned char *addr,
373 struct net_bridge_fdb_entry *fdb;
375 hlist_for_each_entry_rcu(fdb,
376 &br->hash[br_mac_hash(addr, vid)], hlist) {
377 if (ether_addr_equal(fdb->addr.addr, addr) &&
378 fdb->vlan_id == vid) {
379 if (unlikely(has_expired(br, fdb)))
388 #if IS_ENABLED(CONFIG_ATM_LANE)
389 /* Interface used by ATM LANE hook to test
390 * if an addr is on some other bridge port */
391 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr)
393 struct net_bridge_fdb_entry *fdb;
394 struct net_bridge_port *port;
398 port = br_port_get_rcu(dev);
402 fdb = __br_fdb_get(port->br, addr, 0);
403 ret = fdb && fdb->dst && fdb->dst->dev != dev &&
404 fdb->dst->state == BR_STATE_FORWARDING;
410 #endif /* CONFIG_ATM_LANE */
413 * Fill buffer with forwarding table records in
416 int br_fdb_fillbuf(struct net_bridge *br, void *buf,
417 unsigned long maxnum, unsigned long skip)
419 struct __fdb_entry *fe = buf;
421 struct net_bridge_fdb_entry *f;
423 memset(buf, 0, maxnum*sizeof(struct __fdb_entry));
426 for (i = 0; i < BR_HASH_SIZE; i++) {
427 hlist_for_each_entry_rcu(f, &br->hash[i], hlist) {
431 if (has_expired(br, f))
434 /* ignore pseudo entry for local MAC address */
443 /* convert from internal format to API */
444 memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN);
446 /* due to ABI compat need to split into hi/lo */
447 fe->port_no = f->dst->port_no;
448 fe->port_hi = f->dst->port_no >> 8;
450 fe->is_local = f->is_local;
452 fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated);
464 static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head,
465 const unsigned char *addr,
468 struct net_bridge_fdb_entry *fdb;
470 hlist_for_each_entry(fdb, head, hlist) {
471 if (ether_addr_equal(fdb->addr.addr, addr) &&
478 static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head,
479 const unsigned char *addr,
482 struct net_bridge_fdb_entry *fdb;
484 hlist_for_each_entry_rcu(fdb, head, hlist) {
485 if (ether_addr_equal(fdb->addr.addr, addr) &&
492 static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
493 struct net_bridge_port *source,
494 const unsigned char *addr,
497 struct net_bridge_fdb_entry *fdb;
499 fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC);
501 memcpy(fdb->addr.addr, addr, ETH_ALEN);
506 fdb->added_by_user = 0;
507 fdb->added_by_external_learn = 0;
508 fdb->updated = fdb->used = jiffies;
509 hlist_add_head_rcu(&fdb->hlist, head);
514 static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
515 const unsigned char *addr, u16 vid)
517 struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
518 struct net_bridge_fdb_entry *fdb;
520 if (!is_valid_ether_addr(addr))
523 fdb = fdb_find(head, addr, vid);
525 /* it is okay to have multiple ports with same
526 * address, just use the first one.
530 br_warn(br, "adding interface %s with same address "
531 "as a received packet\n",
532 source ? source->dev->name : br->dev->name);
536 fdb = fdb_create(head, source, addr, vid);
540 fdb->is_local = fdb->is_static = 1;
541 fdb_add_hw_addr(br, addr);
542 fdb_notify(br, fdb, RTM_NEWNEIGH);
546 /* Add entry for local address of interface */
547 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
548 const unsigned char *addr, u16 vid)
552 spin_lock_bh(&br->hash_lock);
553 ret = fdb_insert(br, source, addr, vid);
554 spin_unlock_bh(&br->hash_lock);
558 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
559 const unsigned char *addr, u16 vid, bool added_by_user)
561 struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
562 struct net_bridge_fdb_entry *fdb;
563 bool fdb_modified = false;
565 /* some users want to always flood. */
566 if (hold_time(br) == 0)
569 /* ignore packets unless we are using this port */
570 if (!(source->state == BR_STATE_LEARNING ||
571 source->state == BR_STATE_FORWARDING))
574 fdb = fdb_find_rcu(head, addr, vid);
576 /* attempt to update an entry for a local interface */
577 if (unlikely(fdb->is_local)) {
579 br_warn(br, "received packet on %s with "
580 "own address as source address\n",
583 /* fastpath: update of existing entry */
584 if (unlikely(source != fdb->dst)) {
588 fdb->updated = jiffies;
589 if (unlikely(added_by_user))
590 fdb->added_by_user = 1;
591 if (unlikely(fdb_modified))
592 fdb_notify(br, fdb, RTM_NEWNEIGH);
595 spin_lock(&br->hash_lock);
596 if (likely(!fdb_find(head, addr, vid))) {
597 fdb = fdb_create(head, source, addr, vid);
599 if (unlikely(added_by_user))
600 fdb->added_by_user = 1;
601 fdb_notify(br, fdb, RTM_NEWNEIGH);
604 /* else we lose race and someone else inserts
605 * it first, don't bother updating
607 spin_unlock(&br->hash_lock);
611 static int fdb_to_nud(const struct net_bridge_fdb_entry *fdb)
614 return NUD_PERMANENT;
615 else if (fdb->is_static)
617 else if (has_expired(fdb->dst->br, fdb))
620 return NUD_REACHABLE;
623 static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br,
624 const struct net_bridge_fdb_entry *fdb,
625 u32 portid, u32 seq, int type, unsigned int flags)
627 unsigned long now = jiffies;
628 struct nda_cacheinfo ci;
629 struct nlmsghdr *nlh;
632 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
636 ndm = nlmsg_data(nlh);
637 ndm->ndm_family = AF_BRIDGE;
640 ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0;
642 ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex;
643 ndm->ndm_state = fdb_to_nud(fdb);
645 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr))
646 goto nla_put_failure;
647 if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex))
648 goto nla_put_failure;
649 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
650 ci.ndm_confirmed = 0;
651 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
653 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
654 goto nla_put_failure;
656 if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id))
657 goto nla_put_failure;
663 nlmsg_cancel(skb, nlh);
667 static inline size_t fdb_nlmsg_size(void)
669 return NLMSG_ALIGN(sizeof(struct ndmsg))
670 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
671 + nla_total_size(sizeof(u32)) /* NDA_MASTER */
672 + nla_total_size(sizeof(u16)) /* NDA_VLAN */
673 + nla_total_size(sizeof(struct nda_cacheinfo));
676 static void fdb_notify(struct net_bridge *br,
677 const struct net_bridge_fdb_entry *fdb, int type)
679 struct net *net = dev_net(br->dev);
683 skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC);
687 err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0);
689 /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */
690 WARN_ON(err == -EMSGSIZE);
694 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
697 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
700 /* Dump information about entries, in response to GETNEIGH */
701 int br_fdb_dump(struct sk_buff *skb,
702 struct netlink_callback *cb,
703 struct net_device *dev,
704 struct net_device *filter_dev,
707 struct net_bridge *br = netdev_priv(dev);
710 if (!(dev->priv_flags & IFF_EBRIDGE))
714 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
716 for (i = 0; i < BR_HASH_SIZE; i++) {
717 struct net_bridge_fdb_entry *f;
719 hlist_for_each_entry_rcu(f, &br->hash[i], hlist) {
720 if (idx < cb->args[0])
724 (!f->dst || f->dst->dev != filter_dev)) {
725 if (filter_dev != dev)
727 /* !f->dst is a special case for bridge
728 * It means the MAC belongs to the bridge
729 * Therefore need a little more filtering
730 * we only want to dump the !f->dst case
735 if (!filter_dev && f->dst)
738 if (fdb_fill_info(skb, br, f,
739 NETLINK_CB(cb->skb).portid,
753 /* Update (create or replace) forwarding database entry */
754 static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr,
755 __u16 state, __u16 flags, __u16 vid)
757 struct net_bridge *br = source->br;
758 struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
759 struct net_bridge_fdb_entry *fdb;
760 bool modified = false;
762 /* If the port cannot learn allow only local and static entries */
763 if (!(state & NUD_PERMANENT) && !(state & NUD_NOARP) &&
764 !(source->state == BR_STATE_LEARNING ||
765 source->state == BR_STATE_FORWARDING))
768 fdb = fdb_find(head, addr, vid);
770 if (!(flags & NLM_F_CREATE))
773 fdb = fdb_create(head, source, addr, vid);
779 if (flags & NLM_F_EXCL)
782 if (fdb->dst != source) {
788 if (fdb_to_nud(fdb) != state) {
789 if (state & NUD_PERMANENT) {
791 if (!fdb->is_static) {
793 fdb_add_hw_addr(br, addr);
795 } else if (state & NUD_NOARP) {
797 if (!fdb->is_static) {
799 fdb_add_hw_addr(br, addr);
803 if (fdb->is_static) {
805 fdb_del_hw_addr(br, addr);
811 fdb->added_by_user = 1;
815 fdb->updated = jiffies;
816 fdb_notify(br, fdb, RTM_NEWNEIGH);
822 static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p,
823 const unsigned char *addr, u16 nlh_flags, u16 vid)
827 if (ndm->ndm_flags & NTF_USE) {
830 br_fdb_update(p->br, p, addr, vid, true);
834 spin_lock_bh(&p->br->hash_lock);
835 err = fdb_add_entry(p, addr, ndm->ndm_state,
837 spin_unlock_bh(&p->br->hash_lock);
843 /* Add new permanent fdb entry with RTM_NEWNEIGH */
844 int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
845 struct net_device *dev,
846 const unsigned char *addr, u16 vid, u16 nlh_flags)
848 struct net_bridge_vlan_group *vg;
849 struct net_bridge_port *p;
850 struct net_bridge_vlan *v;
853 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) {
854 pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state);
858 if (is_zero_ether_addr(addr)) {
859 pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n");
863 p = br_port_get_rtnl(dev);
865 pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n",
870 vg = nbp_vlan_group(p);
872 v = br_vlan_find(vg, vid);
874 pr_info("bridge: RTM_NEWNEIGH with unconfigured "
875 "vlan %d on port %s\n", vid, dev->name);
879 /* VID was specified, so use it. */
880 err = __br_fdb_add(ndm, p, addr, nlh_flags, vid);
882 err = __br_fdb_add(ndm, p, addr, nlh_flags, 0);
883 if (err || !vg || !vg->num_vlans)
886 /* We have vlans configured on this port and user didn't
887 * specify a VLAN. To be nice, add/update entry for every
890 list_for_each_entry(v, &vg->vlan_list, vlist) {
891 err = __br_fdb_add(ndm, p, addr, nlh_flags, v->vid);
901 static int fdb_delete_by_addr_and_port(struct net_bridge_port *p,
902 const u8 *addr, u16 vlan)
904 struct net_bridge *br = p->br;
905 struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)];
906 struct net_bridge_fdb_entry *fdb;
908 fdb = fdb_find(head, addr, vlan);
909 if (!fdb || fdb->dst != p)
916 static int __br_fdb_delete(struct net_bridge_port *p,
917 const unsigned char *addr, u16 vid)
921 spin_lock_bh(&p->br->hash_lock);
922 err = fdb_delete_by_addr_and_port(p, addr, vid);
923 spin_unlock_bh(&p->br->hash_lock);
928 /* Remove neighbor entry with RTM_DELNEIGH */
929 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
930 struct net_device *dev,
931 const unsigned char *addr, u16 vid)
933 struct net_bridge_vlan_group *vg;
934 struct net_bridge_port *p;
935 struct net_bridge_vlan *v;
938 p = br_port_get_rtnl(dev);
940 pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n",
945 vg = nbp_vlan_group(p);
947 v = br_vlan_find(vg, vid);
949 pr_info("bridge: RTM_DELNEIGH with unconfigured "
950 "vlan %d on port %s\n", vid, dev->name);
954 err = __br_fdb_delete(p, addr, vid);
957 err &= __br_fdb_delete(p, addr, 0);
958 if (!vg || !vg->num_vlans)
961 list_for_each_entry(v, &vg->vlan_list, vlist)
962 err &= __br_fdb_delete(p, addr, v->vid);
968 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p)
970 struct net_bridge_fdb_entry *fdb, *tmp;
976 for (i = 0; i < BR_HASH_SIZE; i++) {
977 hlist_for_each_entry(fdb, &br->hash[i], hlist) {
978 /* We only care for static entries */
982 err = dev_uc_add(p->dev, fdb->addr.addr);
990 for (i = 0; i < BR_HASH_SIZE; i++) {
991 hlist_for_each_entry(tmp, &br->hash[i], hlist) {
992 /* If we reached the fdb that failed, we can stop */
996 /* We only care for static entries */
1000 dev_uc_del(p->dev, tmp->addr.addr);
1006 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p)
1008 struct net_bridge_fdb_entry *fdb;
1013 for (i = 0; i < BR_HASH_SIZE; i++) {
1014 hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) {
1015 /* We only care for static entries */
1016 if (!fdb->is_static)
1019 dev_uc_del(p->dev, fdb->addr.addr);
1024 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
1025 const unsigned char *addr, u16 vid)
1027 struct hlist_head *head;
1028 struct net_bridge_fdb_entry *fdb;
1032 spin_lock_bh(&br->hash_lock);
1034 head = &br->hash[br_mac_hash(addr, vid)];
1035 fdb = fdb_find(head, addr, vid);
1037 fdb = fdb_create(head, p, addr, vid);
1042 fdb->added_by_external_learn = 1;
1043 fdb_notify(br, fdb, RTM_NEWNEIGH);
1044 } else if (fdb->added_by_external_learn) {
1046 fdb->updated = fdb->used = jiffies;
1047 } else if (!fdb->added_by_user) {
1048 /* Take over SW learned entry */
1049 fdb->added_by_external_learn = 1;
1050 fdb->updated = jiffies;
1051 fdb_notify(br, fdb, RTM_NEWNEIGH);
1055 spin_unlock_bh(&br->hash_lock);
1060 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
1061 const unsigned char *addr, u16 vid)
1063 struct hlist_head *head;
1064 struct net_bridge_fdb_entry *fdb;
1068 spin_lock_bh(&br->hash_lock);
1070 head = &br->hash[br_mac_hash(addr, vid)];
1071 fdb = fdb_find(head, addr, vid);
1072 if (fdb && fdb->added_by_external_learn)
1073 fdb_delete(br, fdb);
1077 spin_unlock_bh(&br->hash_lock);